/Engine/Source/Runtime/TypedElementFramework/Public/Elements/Interfaces/TypedElementDataStorageInterface.h
Add multiple rows at once. For each new row the OnCreated callback is called. Callers are expected to use the callback to initialize the row if needed. This version uses a set of previously reserved rows. Any row that can't be used will be released.
bool BatchAddRow ( TypedElementTableHandle Table, TConstArrayView< TypedElementRowHandle > ReservedHandles, TypedElementDataStorageCreationCallbackRef OnCreated )